# CVE-2017-15698: Security feature bypass in Apache Tomcat Native

> Attackers can bypass OCSP revocation checks in Apache Tomcat Native Connector by using long AIA fields, allowing revoked client certificates to be accepted.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 31 Jan 2018
- **Updated:** 16 Sep 2024
- **Also known as:** DEBIAN-CVE-2017-15698, DLA-1276-1, DSA-4118-1, GHSA-ppg5-72hh-9jj4, MGASA-2018-0150, UBUNTU-CVE-2017-15698

## What is CVE-2017-15698?

CVE-2017-15698 is a medium-severity vulnerability in Debian Debian Linux, published on 31 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

When parsing the AIA-Extension field of a client certificate, Apache Tomcat Native Connector 1.2.0 to 1.2.14 and 1.1.23 to 1.1.34 did not correctly handle fields longer than 127 bytes. The result of the parsing error was to skip the OCSP check. It was therefore possible for client certificates that should have been rejected (if the OCSP check had been made) to be accepted. Users not using OCSP checks are not affected by this vulnerability.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2017-15698?

It affects 2 products.


Products: Apache Tomcat Native, Debian Debian Linux.

## How do I fix CVE-2017-15698?

Apply the vendor's patch.

## Is CVE-2017-15698 being exploited?

There is no known exploitation of CVE-2017-15698 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2026-86246](https://insights.sbomify.com/CVE-2026-86246/): Apache Tomcat Native: Insecure OpenSSL options enabled (critical 9.1)
- [CVE-2026-86243](https://insights.sbomify.com/CVE-2026-86243/): Apache Tomcat Native: DoS via TLS handshake (high 7.5)
- [CVE-2026-86247](https://insights.sbomify.com/CVE-2026-86247/): Apache Tomcat Native: Client certificate requirements can be down-graded (high 7.4)
- [CVE-2018-8019](https://insights.sbomify.com/CVE-2018-8019/): Auth bypass in Apache Tomcat Native (high 7.4)
- [CVE-2018-8020](https://insights.sbomify.com/CVE-2018-8020/): Auth bypass in Apache Tomcat Native (high 7.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-15698 and fix it if it is affected.

What it is: CVE-2017-15698 is a medium-severity vulnerability in Debian Debian Linux, published on 31 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-15698 in the wild and no public exploit code.

Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2017-15698/ (Markdown: https://insights.sbomify.com/CVE-2017-15698/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-15698
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-15698
- OSV: https://osv.dev/vulnerability/CVE-2017-15698

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-15698/
Summaries are generated and may contain mistakes; the official description above is the record.